US11873020B2 - Delivery systems for ramps or stairs - Google Patents

Delivery systems for ramps or stairs Download PDF

Info

Publication number
US11873020B2
US11873020B2 US17/985,848 US202217985848A US11873020B2 US 11873020 B2 US11873020 B2 US 11873020B2 US 202217985848 A US202217985848 A US 202217985848A US 11873020 B2 US11873020 B2 US 11873020B2
Authority
US
United States
Prior art keywords
platform
pallet lift
base
pallet
lift
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
US17/985,848
Other languages
English (en)
Other versions
US20230150560A1 (en
Inventor
Dane Gin Mun Kalinowski
II Joseph E. Popovits
Travis James Englert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rehrig Pacific Co Inc
Original Assignee
Rehrig Pacific Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rehrig Pacific Co Inc filed Critical Rehrig Pacific Co Inc
Priority to US17/985,848 priority Critical patent/US11873020B2/en
Assigned to REHRIG PACIFIC COMPANY reassignment REHRIG PACIFIC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: POPOVITS, JOSEPH E., II, ENGLERT, TRAVIS JAMES, KALINOWSKI, DANE GIN MUN
Publication of US20230150560A1 publication Critical patent/US20230150560A1/en
Priority to US18/529,807 priority patent/US20240101176A1/en
Application granted granted Critical
Publication of US11873020B2 publication Critical patent/US11873020B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
    • B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
    • B62B3/0612—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground power operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/001—Steering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B62B5/0026—Propulsion aids
    • B62B5/0033—Electric motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B62B5/0026—Propulsion aids
    • B62B5/0069—Control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B62B5/02—Accessories or details specially adapted for hand carts providing for travelling up or down a flight of stairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B62B5/06—Hand moving equipment, e.g. handle bars
    • B62B5/063—Hand moving equipment, e.g. handle bars for low-lift hand trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/0755—Position control; Position detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07559—Stabilizing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2203/00—Grasping, holding, supporting the objects
    • B62B2203/07—Comprising a moving platform or the like, e.g. for unloading
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
    • B62B2301/10—Adjusting the position of the wheel axles to increase stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
    • B62B2301/25—Wheel arrangements; Steering; Stability; Wheel suspension characterised by the ground engaging elements, e.g. wheel type
    • B62B2301/256—Wheel arrangements; Steering; Stability; Wheel suspension characterised by the ground engaging elements, e.g. wheel type by using endless belts

Definitions

  • box trucks are becoming a common choice to make many types of deliveries. They offer value over tractor trailers for many delivery routes because drivers do not need a commercial driver license to operate them (large labor pool, non-specialized), and typically box trucks are cheaper to operate and are more maneuverable than tractor trailers.
  • box trucks are equipped with either a hydraulic liftgate, or a long (10-14′) ramp which is stowed underneath the truck while in route.
  • the product must also be transported up or down stairs, which is not possible with a traditional pallet jack and which is difficult with a dolly.
  • the delivery system improves safety and delivery efficiency over current state, where ramps are used, to reduce operator injury and spills by keeping the load level while moving up and down the ramp.
  • Another embodiment of the delivery system makes it easier to bring a load up or down stairs.
  • the techniques described herein relate to a pallet lift including: a base; a deck extending forward of the base; load wheels supporting the deck; and a platform above the deck and pivotable relative to the base, wherein the platform has an upper support surface for supporting objects thereon.
  • the techniques described herein relate to a pallet lift further including a backrest extending upward from the platform, wherein the backrest is pivotably secured to the base.
  • the techniques described herein relate to a pallet lift further including an actuator configured to pivot the platform relative to the base.
  • the techniques described herein relate to a pallet lift wherein the platform is pivotable about an axis parallel to axes of the load wheels.
  • the techniques described herein relate to a pallet lift further including a rear wheel mounted below the base and pivotable relative to the base by a tiller arm.
  • the techniques described herein relate to a pallet lift further including a gravity sensor configured to detect its orientation relative to gravity.
  • the techniques described herein relate to a pallet lift further including a controller configured to automatically cause the platform to pivot relative to the base based upon a gravity signal from the gravity sensor.
  • the techniques described herein relate to a pallet lift further including a speed sensor configured to detect a speed of the pallet lift and to generate a speed signal indicative of the speed of the pallet lift, wherein the pallet lift further includes at least one motor for powering at least one of the load wheels, wherein the controller is configured control a speed of the at least one motor based upon the speed signal from the speed sensor.
  • the techniques described herein relate to a pallet lift wherein the controller is configured to control the speed of the at least one motor based upon the gravity signal.
  • the techniques described herein relate to a pallet lift wherein the load wheels are secured to arms pivotably secured to the deck.
  • the techniques described herein relate to a pallet lift further including: at least one camera mounted to the deck; and a display mounted to the base, the display configured to display a live view from the at least one camera.
  • the techniques described herein relate to a method for moving a load including: a) moving a load on a platform onto an inclined ramp; b) pivoting the load and the platform relative to wheels supporting the platform on the inclined ramp; and c) moving the load on the platform across the inclined ramp while the load and the platform are pivoted relative to the wheels.
  • the techniques described herein relate to a method wherein the platform is substantially perpendicular to gravity during step c).
  • the techniques described herein relate to a method wherein the inclined ramp is inclined more than ten degrees.
  • the techniques described herein relate to a pallet lift including: a base; at least one rear wheel supporting the base; a platform extending forward from the base; and a load wheel secured to an arm pivotably secured to the platform, wherein the arm is configured to move the load wheel toward and away from the platform thereby pivoting the platform relative to a surface on which the at least one rear wheel and the load wheel are supported.
  • the techniques described herein relate to a pallet lift wherein the arm is able to move the load wheel toward and away from the platform without moving the at least one rear wheel relative to the base.
  • the techniques described herein relate to a stair climbing device including: a base; a motor mounted to the base; and a plurality of rods configured to be rotatably driven by the motor about an axis perpendicularly to the plurality of rods.
  • the techniques described herein relate to a stair climbing device in combination with a hand cart, wherein the stair climbing device is secured to the hand cart.
  • the techniques described herein relate to a method for stabilizing a load including: a) supporting a load on a platform; b) detecting a change in orientation of the platform; and c) pivoting the platform relative to a surface on which the platform is supported to counteract the change in orientation detected in step b).
  • the techniques described herein relate to a method wherein the change in orientation in step b) is caused by wheels supporting the platform being supported on an inclined surface.
  • step c) further includes pivoting the platform relative to the wheels to maintain the platform substantially perpendicular to gravity.
  • the techniques described herein relate to a method wherein the platform is connected to a backrest and wherein the platform and backrest are pivoted in step c).
  • the techniques described herein relate to a method wherein the platform and backrest are pivoted away from the inclined surface in step c).
  • the techniques described herein relate to a pallet lift having: a base; at least one rear wheel supporting the base; a platform extending forward from the base; a camera mounted proximate a front of the pallet lift; a display oriented generally rearward of the pallet lift, the display configured to provide a live video feed from the camera; and a load wheel secured to an arm pivotably secured to the platform, wherein the arm is configured to move the load wheel toward and away from the platform.
  • FIG. 1 shows a ramp delivery system according to a first embodiment, which is a pallet lift.
  • FIG. 2 shows the pallet lift of FIG. 1 with the platform raised relative to the load wheels and the rear wheel.
  • FIG. 3 shows the pallet lift of FIG. 2 supporting a pallet thereon.
  • FIG. 4 shows the pallet lift of FIG. 1 moving down a ramp R.
  • FIG. 5 shows the pallet lift of FIG. 1 traveling up the ramp R (or other incline).
  • FIG. 6 shows the pallet lift of FIG. 1 carrying a pallet down a ramp.
  • FIG. 7 shows the pallet lift carrying products up an incline (such as a ramp).
  • FIG. 8 shows a ramp delivery system according to a second embodiment, which is a pallet lift, traveling down a ramp.
  • FIG. 9 shows the pallet lift of FIG. 8 traveling up an incline.
  • FIGS. 10 and 11 show a third embodiment of a ramp delivery system, which is again a pallet lift, traveling at an angle down a ramp.
  • FIG. 12 shows a delivery system according to another embodiment.
  • FIG. 13 shows the stair climbing device of FIG. 12 .
  • FIG. 14 shows the stair climbing device separated and hand cart of FIG. 12 disconnected from one another.
  • FIG. 15 shows another embodiment of a ramp delivery system, which is a pallet lift.
  • FIG. 16 is a side view of the pallet lift in the raised position, such as would be used to raise a pallet.
  • FIG. 17 shows the pallet lift of FIG. 16 traveling down a ramp.
  • FIG. 18 is a front view of the pallet lift of FIG. 15 .
  • FIG. 19 is a front view of the pallet lift of FIG. 15 with the platform tilted back.
  • FIG. 20 is a front view of the pallet lift of FIG. 17 , with the tines raised, the platform tilted back and with an optional camera.
  • FIG. 21 is a front perspective view of the pallet lift of FIG. 15 .
  • FIG. 22 is a front perspective view of the pallet lift of FIG. 19 .
  • FIG. 23 is a front perspective view of the pallet lift of FIG. 17 .
  • FIG. 24 is a side view of the pallet lift of FIG. 17 .
  • FIG. 25 is a bottom perspective view of the pallet lift.
  • FIG. 26 is a partially exploded view of the pallet lift with the platform removed for visibility.
  • FIG. 27 is a partially exploded upper rear view of the base of the pallet lift.
  • FIG. 28 is a partially exploded front view of the base of the pallet lift.
  • FIG. 29 shows one possible schematic of the pallet lift.
  • FIG. 30 shows the pallet lift carrying a pallet on the platform down a ramp between a truck and ground.
  • FIG. 1 shows a ramp delivery system according to a first embodiment, which is a pallet lift 10 .
  • the pallet lift 10 includes a base 12 and a platform 14 extending forward from the base 12 .
  • a tiller arm 16 is pivotably connected to the base 12 and is used to steer and control the pallet lift 10 .
  • a rear wheel 18 is mounted below the base 12 and may be pivoted by the tiller arm 16 .
  • Load wheels 20 (preferably two, but only one is visible) support the platform 14 .
  • the platform 14 may comprise a single, continuous structure or a pair of spaced-apart tines.
  • the rear wheel 18 and/or the load wheels 20 may be motorized, such as by having hub motors therein to drive, brake and control the pallet lift 10 .
  • the pallet lift 10 may take the form of a pallet jack, with hydraulics or electric motors or actuators configured to lift the platform 14 relative to the floor, such as by pivoting the load wheels 20 away from the platform 14 .
  • the pallet lift 10 raises the platform relative to the load wheels 20 and the rear wheel 18 .
  • the load wheels 20 are rotatably connected at the ends of arms 22 that are pivotably connected to the platform 14 about an axis 24 .
  • Rotation of the arms 22 by a front actuator 32 which may be a hydraulic cylinder or electric motor or linear actuator or other suitable device, causes the platform 14 to lift relative to the load wheels 20 .
  • a front actuator 32 which may be a hydraulic cylinder or electric motor or linear actuator or other suitable device, causes the platform 14 to lift relative to the load wheels 20 .
  • the arms 22 are substantially longer (e.g. more than 12′′, and in the range of 12′′ to 30′′).
  • a separate rear actuator 30 (which again may be a hydraulic cylinder or electric motor or linear actuator or other suitable device) lifts the base 12 of the pallet lift 10 relative to the rear wheel 18 .
  • the base 12 can be raised and lowered relative to the rear wheel 18 and the platform 14 can be raised and lowered relative to the load wheels 20 . Because they have their own actuators 30 , 32 , the front and rear of the pallet lift 10 can be raised and lowered independently of one another, or together (as in FIG. 2 ).
  • the platform 14 can be used to lift a pallet 50 off a floor for moving the pallet 50 .
  • the platform 14 is substantially parallel to the floor on which the pallet lift 10 is supported. It should be noted that a slight rearward tilt (e.g. approximately a degree or two) would be considered substantially parallel to the floor in this context.
  • the front actuator 32 rotates the arms 22 to extend the load wheels 20 downward far enough to keep the platform 14 level relative to the earth.
  • the base 12 is not raised relative to the rear wheel 18 (or at least, not as much). This keeps the platform 14 level, i.e. substantially perpendicular to gravity, and the load (not shown) stable on the platform 14 .
  • the motors on the load wheels 20 and/or rear wheel 18 control the pace of the descent.
  • the rear actuator 30 for raising the base 12 relative to the rear wheel 18 can be activated independently of the front actuator 32 for raising the platform 14 relative to the load wheels 20 , and vice versa.
  • the platform 14 is both raised above the floor (e.g. to lift a pallet off the floor) and maintained to be level relative to earth.
  • sensors on the pallet lift 10 e.g. a two-axis accelerometer, a three-axis accelerometer and/or gyroscope in the base 12 or on the platform 14
  • sensors on the pallet lift 10 are configured to detect the direction of gravity.
  • a controller which may include a processor or hardwired control circuitry or control logic
  • a controller is programmed to maintain the sensors, the base 12 , and/or the platform 14 normal to the direction of gravity by adjusting the relative height between the platform 14 and the load wheels 20 and the relative height between the base 12 and the rear wheel 18 .
  • One method of automatically leveling the load while the pallet lift 10 navigates non-level surfaces could be detecting the difference between the normal vector of pallet lift 10 platform and the gravitational normal vector, then adjusting the platform 14 tilt angle in real time to keep both vectors parallel so that the load is level.
  • the lift height and tilt angle could be controlled by the same actuator, such that the initial displacement results in vertical lift (or substantially vertical lift) and further displacement results in tilting (or much more substantial tilting) of the load platform. This could be accomplished by cams, gears, levers, etc.
  • the amount of lift and amount of tilt could be controlled separately and operated as two separate systems.
  • the lift and tilt could also be operated manually, hydraulically, electrically, pneumatically or a combination of all.
  • the auto tilt could be turned on by a button, switch, or automatically turn on after sensing the system is on a grade.
  • the pallet lift 10 could use a platform 14 which can lift a pallet 50 or allow product to be set directly on the platform.
  • the platform 14 could have features which interlock with a pallet 50 to prevent the pallet 50 from sliding off.
  • the platform 14 could also have features to prevent loose product from sliding off.
  • Features could include rails, textured surfaces, locking belts or a combination.
  • the platform could contain a backrest to stabilize the load during use.
  • the pallet lift 10 may also be configured to provide leveling of the platform 14 while the pallet lift 10 is traveling up the ramp R (or other incline).
  • the distance between the base 12 and the rear wheel 18 is increased by the rear actuator 30 ( FIG. 2 ) more than the distance between the platform 14 and the load wheels 20 by front actuator 32 ( FIG. 2 ). This can be implemented because the actuators for raising the base 12 and raising the platform 14 are independent of one another.
  • the actuators could be controlled by a microprocessor or hardwired circuitry or control logic based upon one or more sensors (such as a three-axis accelerometer and optionally a gyroscope) in the base 12 that determines the direction of gravity and maintains the platform 14 orthogonal to gravity.
  • sensors such as a three-axis accelerometer and optionally a gyroscope
  • FIG. 6 shows the pallet lift 10 carrying a pallet 50 down a ramp.
  • the arms 22 are pivoted downward substantially so that the load wheels 20 are moved a much greater distance from the platform 14 than the rear wheel 18 is moved from the base 12 .
  • the pallet 50 is maintained substantially level relative to earth.
  • FIG. 7 shows the pallet lift 10 carrying products 52 (in this example, boxes) up an incline (such as a ramp).
  • the sensors on the pallet lift 10 detect the direction of gravity and maintain the platform 14 orthogonal to gravity.
  • the controller automatically causes the rear actuator 30 to extend the rear wheel 18 downward from the base 12 significantly more than the front actuator 32 extends the load wheels 20 from the platform 14 .
  • either or both the load wheels 20 and the rear wheel 18 can include a motor (such as a hub motor) for propelling the pallet lift 10 up the incline.
  • FIG. 8 shows a ramp delivery system according to a second embodiment, which is a pallet lift 110 .
  • the pallet lift 110 includes the same base 12 , platform 14 , tiller arm 16 , rear wheel 18 and actuators 30 , 32 ( FIG. 2 ) as before.
  • the load wheels in this embodiment are each continuous track systems 120 each with a plurality of wheels 130 , 132 , 134 (in this example, three) all encircled by a tread 136 .
  • a pair of arms 126 , 128 extend away from a lower end of each arm 122 .
  • the center wheel 134 is rotatably connected at a lower end of the arm 122 .
  • the outer wheels 130 , 132 are rotatably connected at ends of the arms 126 , 128 .
  • the continuous track systems 120 pivot relative to the lower end of the arm 122 .
  • the continuous track systems 120 enable the pallet lift 110 to traverse up and down stairways, rough terrain, curbs, and uneven surfaces. Otherwise, the pallet lift 110 operates in the same way described above with respect to FIGS. 1 - 7 .
  • the pallet lift 110 is traveling down an incline so the front actuator 32 ( FIG. 2 ) extends the continuous track systems 120 from the platform 14 by a distance greater than the rear actuator 30 ( FIG. 2 ) extends the rear wheel 18 from the base 12 to maintain the platform 14 orthogonal to gravity.
  • the pallet lift 110 is traveling up an incline, so the rear wheel 18 extends further from the base 12 than the continuous track systems 120 does from the platform 14 to maintain the platform 14 level relative to earth.
  • FIGS. 10 and 11 show a third embodiment of a ramp delivery system, which is again a pallet lift 210 .
  • the base 12 , platform 14 , tiller arm 16 and rear wheel 18 may be the same as above.
  • the arms 222 are configured to be actuated independently from one another (as well as independently of the rear wheel 18 ).
  • there would be two front actuators 32 one for each of the arms 222 .
  • the pallet lift 210 provides control of the tilt of the platform 14 about two axes.
  • the pallet lift 210 can control the tilt of the platform 14 about the longitudinal axis of the platform 14 (roll).
  • a three-axis accelerometer or two-axis accelerometer and/or other sensors can indicate the orientation of the pallet lift 210 relative to gravity and a controller on board the pallet lift 210 can deploy the rear wheel 18 , and each of the arms 222 an appropriate distance to maintain the platform 14 orthogonal (or substantially orthogonal) to gravity.
  • the load is kept level by tilting the load platform separately from the rest of the system, so that the system normal vector is parallel with the ramp normal vector and the load platform normal vector is parallel with the gravitational normal vector.
  • the wheels could lift independently, providing tilt to the whole lift or it could just tilt the platform.
  • the system could have a removable platform so that different sized platforms could be used with the same lift. This would allow the lift to be optimized for different load sizes or delivery needs.
  • the system could also have attachment points so that accessories to carry specialized containers can be quickly attached, such as a cylindrical racks to house beer kegs or CO2 bottles used in the beverage industry.
  • the system could be stowed either inside or outside the delivery vehicle on a specialized storage platform or enclosure which includes provisions to recharge the system and secure the system during transportation.
  • Battery charging could commence automatically once the system is in stowage.
  • the charging method could be wireless, self-connecting magnetic plugs, large sprung pads that contact when stowed.
  • the platform or enclosure could have an integrated ramp so that a separate ramp is not needed.
  • the ramp could be hinged, folding, or the stowage platform could be the ramp itself.
  • the ramp could be counterweighted or spring assisted to make opening and closing easier. Counterweighting and assistance could be done with springs, pneumatically, hydraulically, or electrically.
  • the load could be automatically leveled by suspending the load platform similar to a swing and utilizing gravitational force to keep the load platform level.
  • damper could be used to prevent the load from oscillating.
  • the amount of tilt could be controlled manually by the operator at his discretion either physically or electronically.
  • the auto tilt could be turned on by a button, switch, or automatically turn on after sensing the system is on a grade.
  • the platform 14 may be desirable to maintain the platform 14 in a desired orientation other than strictly orthogonal to gravity. For example, it may be desirable to achieve a desired orientation wherein the platform 14 is tilted back toward the base 12 (or a backrest) slightly for stability. Also, the desired orientation of the platform 14 may be any angle depending on what is being supported on the platform 14 and how/whether the item being supported on the platform 14 is secured to the platform 14 .
  • a delivery system 310 is shown in FIG. 12 .
  • a standard hand cart 312 is shown having a support platform 314 a vertical support 316 and handles 318 .
  • a pair of wheels 320 are mounted to a lower end of the vertical support 316 .
  • a stair climbing device 330 is shown removably secured to the hand cart 312 .
  • the detachable stair climbing device 330 allows a user to attach the device to the system (such as the hand cart 312 ) to safely and efficiently carry a load up and down stairs when needed, but have the benefits of a lighter and more maneuverable piece of equipment when not.
  • the stair climbing device 330 could be stored in the delivery vehicle and attached to a piece of equipment like a cart or hand cart 312 when the user needs to bring a load up or down stairs.
  • the stair climbing device 330 includes a base 332 , such as a metal plate.
  • a motor 334 is mounted to the base 332 .
  • Rods 336 are mounted at opposite ends of the motor 334 .
  • the rods 336 are perpendicular to the long axis of the motor 334 .
  • a battery 338 or other power source is mounted to the base 332 and is connected to the motor 334 .
  • the stair climbing device 330 could be powered electrically by the battery 338 .
  • the battery 338 could be removeable or built in, and it could have charging features which make it convenient to be rechargeable in the delivery trailer.
  • the stair climbing device 330 when it is used with delivery equipment other than the hand cart 312 , the stair climbing device 330 could utilize the power source of the equipment it is being used with. The stair climbing device 330 could plug into the equipment or the equipment battery could be transferred to the stair climbing device 330 .
  • the stair climbing device 330 could have a removable battery pack that could be charged by itself or within the stair climbing device 330 .
  • the stair climbing device 330 could operate by a mechanical device, such as leverage or friction. It could use a foot pedal to raise the load step by step. It could use friction to slow the descent.
  • the stair climbing device 330 could have sensors integrated into the body that detect when to climb or descend automatically.
  • the sensors could be physical such as a limit switch, optical such as laser/lidar style, others such as sonar or a combination of them.
  • the stair climbing device 330 could communicate with the delivery equipment electronically or mechanically to detect when to climb or descend.
  • the stair climbing device 330 can be selectively removed from the standard hand cart 312 so that the standard hand cart 312 can be used without the weight of the stair climbing device 330 .
  • the method of attachment could be mechanical, magnetic, or a combination of the two.
  • latches and catches could be used on the stair climbing device 330 and hand cart 312 to secure the two together quickly.
  • the stair climbing device 330 could be provided with a mounting kit so that it could be mounted to a range of delivery equipment besides the hand cart 312 .
  • the stair climbing device 330 could be a modular accessory to a powered piece of equipment and the quick attachment process could include a power plug to power the stair climbing device 330 from the main piece of equipment.
  • stair climbing device 330 There could be controls on the stair climbing device 330 to climb or descend or the stair climbing device 330 could be controlled wirelessly by remote.
  • the controls could be wired to the stair climbing device 330 and attach to the hand cart 312 for one handed operation.
  • the control could attach with magnets, with Velcro straps, with a clasp, or another way of being secured to the hand cart 312 or other delivery equipment.
  • control could be wireless and could be stored within the stair climbing device 330 then removed for use.
  • the control could be battery operated and could be recharged by the hand cart 312 when not in use.
  • controls could be built into the hand cart 312 or other delivery equipment, so that once the stair climbing device 330 is attached, they become active and functional.
  • the stair climbing device 330 could attach magnetically and engage mounting features on the hand cart 312 (or other delivery equipment).
  • FIG. 15 shows another embodiment of a ramp delivery system, which is a pallet lift 410 .
  • the pallet lift 410 includes a base 412 and a platform 414 extending forward from the base 412 .
  • a backrest 415 extends upward from a rear end of the platform 414 .
  • a tiller arm 416 is pivotably connected to the base 412 and is used to steer and control the pallet lift 410 .
  • a rear wheel 418 is mounted below the base 412 and may be pivoted by the tiller arm 416 to provide steering.
  • the pallet lift 410 may have casters mounted below the base 412 and fixed handles could be mounted to the base 412 instead of the tiller arm 416 .
  • Load wheels 420 (preferably two, but only one is visible in FIG. 15 ) support the platform 414 .
  • the platform 414 may comprise a solid platform (as shown in this example) or a pair of spaced-apart tines, depending on the type of pallets to be used with the pallet lift 410 .
  • the lift function is not necessary so the load wheels 420 and rear wheel 418 can be set at a fixed height and the lift actuator 430 would be eliminated.
  • the load wheels 420 may be motorized, such as by having hub motors therein to drive, brake and control the pallet lift 410 .
  • the rear wheel 418 may be motorized, such as by having a hub motor therein.
  • the pallet lift 410 may in some aspects generally take the form of a pallet jack, with hydraulics or electric motors or actuators configured to lift the platform 414 relative to the floor.
  • the platform 414 and the backrest 415 are secured to one another or formed integrally to form a rigid L-shaped member.
  • the backrest 415 is pivotably secured to the base 412 at an axis 440 .
  • the axis 440 is horizontal, i.e. generally parallel to the floor and parallel to the axes of the load wheels 420 .
  • FIG. 16 is a side view of the pallet lift 410 in the raised position, such as would be used to raise a pallet (e.g. pallet 50 of FIG. 3 ) off the floor.
  • a lift actuator 430 lifts the base 412 relative to the rear wheel 418 .
  • the lift actuator 430 may be a hydraulic cylinder, electric motor, linear actuator or other suitable actuator. Manual mechanical devices, such as levers and ratchets, could also be used.
  • the lift actuator 430 is mounted between the rear wheel 418 and the base 412 and is configured to move the rear wheel 418 toward and away from the base 412 and, via linkage, to pivot the arms 442 and load wheels 420 toward and away from the tines 444 .
  • the lift actuator 430 and its configuration for raising and lowering the tines 444 relative to the floor may be similar to a conventional pallet jack.
  • the load wheels 420 are still pivoted downward on arms 442 to raise the tines 444 and the platform 414 , and the rear wheel 418 is also moved away from the base 412 .
  • a pallet (not shown) supported on the platform 414 would be lifted from the floor for transport by the pallet lift 410 .
  • the platform 414 and backrest 415 are pivotable relative to the base 412 . The upper end of the backrest 415 has been pivoted rearward about the axis 440 , thereby raising the front end of the platform 414 .
  • the pallet lift 410 is on a ramp R that is tilted relative to a horizontal plane of the floor/earth (which is perpendicular to gravity).
  • the platform 414 and backrest 415 are pivoted rearward about axis 440 while the pallet lift 410 travels down the ramp R.
  • Preferably the platform 414 and backrest 415 are pivoted so that the upper support surface of the platform 414 is parallel to the floor (i.e. perpendicular to gravity) or tilted rearward slightly (e.g. approximately two degrees, again, still considered substantially perpendicular to gravity). This may be performed automatically as described herein based upon sensor input, or this may be performed manually by the operator. In this manner, a load, such as a loaded pallet, will be stable on the pallet lift 410 as the pallet lift 410 travels down (or up) the ramp R.
  • FIGS. 18 - 20 are front views of the pallet lift 410 .
  • FIGS. 21 - 23 are front perspective views of the pallet lift 410 .
  • the platform 414 is in a lowered, horizontal position.
  • the platform 414 and backrest 415 are tilted rearward by a tilt actuator 446 secured to a forward end of the platform 414 and to the base 412 .
  • the tilt actuator 446 may be a hydraulic cylinder, electric motor, linear actuator, or other actuator. Manual mechanical devices, such as levers and ratchets, could also be used.
  • the tines 444 , base 412 , platform 414 and backrest 415 are raised upward relative to the floor and relative to the rear wheel 418 and the load wheels 420 .
  • the platform 414 and backrest 415 are also tilted rearwardly relative to the base 412 and the tines 444 .
  • FIG. 20 shows the pallet lift 410 with an optional camera 462 mounted to one of the tines 444 and facing forward of the pallet lift 410 .
  • the camera 462 is mounted between the tines 444 in this example, but other locations may be suitable as well.
  • FIG. 25 is a bottom perspective view of the pallet sled 410 .
  • Linkage 450 is coupled to each of a pair of push rods 448 leading to each arm 442 .
  • the linkage 450 (via the lift actuator 430 ) forces the push rods 448 forward and rearward parallel to the tines 444 .
  • the arms 442 are pivotably coupled to the tines 444 about an arm axis.
  • the push rods 448 are also pivotably coupled to the arms 442 at a pushrod axis offset from the arm axis. Forward and rearward motion of the push rods 448 thus causes the arms 442 to pivot relative to the tines 444 , thereby moving the load wheels 420 toward and away from the tines 444 .
  • FIG. 26 is a partially exploded view of the pallet lift 410 with the platform 414 removed for visibility.
  • the tines 444 extend forward from the base 412 .
  • the tilt actuator 446 is pivotably coupled to the base 412 between the tines 444 .
  • the push rods 448 are configured to be pivotably coupled to the arms 442 at pushrod axes offset from the arm axes about which the arms 442 pivot relative to the tines 444 .
  • the optional camera 462 is shown mounted to one of the tines 444 and directed forward of the pallet lift 410 .
  • FIG. 27 is a partially exploded upper rear view of the base 412 of the pallet lift 410 .
  • the lift actuator 430 is secured to a rear wall of the base 412 .
  • FIG. 27 shows an optional display 470 mounted to the base 412 , which faces the user during use.
  • the display 470 could be part of a mobile device, such as a tablet having a processor 454 ( FIG. 29 ).
  • FIG. 28 is a partially exploded front view of the base 412 of the pallet lift 410 .
  • Fasteners 452 provide a pivoting hinge connection along axis 440 between the backrest 415 and the base 412 .
  • FIG. 29 shows one possible schematic of the pallet lift 410 .
  • a processor 454 may be mounted in the base 412 .
  • the processor 454 is connected to electronic storage 456 storing computer instructions which when executed by the processor 454 causes the processor 454 to perform the functions described herein.
  • the processor 454 could include a plurality of processors including processors of different types at different locations.
  • the processor 454 receives inputs from a tilt sensor 458 , which may be a three-axis or two-axis accelerometer, or other sensor that generates a signal indicating its orientation relative to gravity.
  • the tilt sensor 458 is mounted in a fixed orientation relative to the platform 414 .
  • the tilt sensor 458 may be mounted to the backrest 415 or to the platform 414 .
  • At least one speed sensor 460 is mounted to one of the load wheels 420 and/or the rear wheel 418 .
  • a camera 462 is mounted to one of the tines 444 (or otherwise to the deck below the platform) or to the platform 414 .
  • the camera 462 provides continuous live video from the camera 462 to the processor 454 and then to the display 470 (or directly to the display 470 ).
  • the processor 454 receives a signal from a user interface 464 , which may be a touchscreen (e.g. display 470 ), microphone, button, switch, keyboard, trackpad, mouse, etc.
  • the processor 454 sends control signals to the tilt actuator 446 and the lift actuator 430 in the manner described herein.
  • the processor 454 also sends control signals to motors 466 coupled to or within one or both of the load wheels 420 or the rear wheel 418 .
  • the processor 454 also controls a brake 468 (if provided) on one or more of the load wheels 420 and rear wheel 418 .
  • the processor 454 is configured to send live video from the camera 462 to a display 470 mounted to the backrest 415 or to the base 412 .
  • the processor 454 may enhance the live video with guidelines to help the user steer the pallet lift 410 .
  • the processor 454 is connected to a wireless communication circuit 472 such as cell data, wifi, Bluetooth, etc.
  • FIG. 30 shows the pallet lift 410 carrying a pallet 50 on the platform 414 .
  • the pallet 50 is loaded with a stack of products 52 .
  • a ramp R extends from a floor of truck T to ground G.
  • the ramp R may be inclined more than ten degrees.
  • the tilt sensor 458 senses the change in orientation of the backrest 415 and platform 414 .
  • the processor 454 receives this signal from the tilt sensor 458 and commands the tilt actuator 446 to pivot the platform 414 and backrest 415 rearward until the tilt sensor 458 detects that the platform 414 is returned to generally level relative to gravity, i.e. perpendicular to gravity (or tilted rearward slightly, e.g.
  • the pallet lift 410 will gradually tilt and the pallet lift 410 will gradually extend the tilt actuator 446 pivoting the platform 414 more and more until the rear wheel 418 is also on the ramp R, which is when the pallet lift 410 will be tilted the most. Then, when the load wheels 420 reach the relatively level ground G, the pallet lift 410 will gradually return to level and the tilt actuator 446 will be gradually retracted, pivoting the platform 414 downward to maintain the platform 414 perpendicular to gravity (or tilted slightly rearward). When the rear wheel 418 reaches the ground G, the platform 414 will be returned to an orientation generally parallel to the tines 444 , again, substantially orthogonal to gravity.
  • FIG. 30 shows an alternate location for the camera 462 a , mounted to the front of the platform 414 (or just under the front of the platform 414 ).
  • the camera 462 or camera 462 a could also be used on level surfaces when the platform 414 are not tilted relative to the base 412 .
  • the display 470 could also have overlaid navigation lines that show the operator the expected path of the pallet lift 410 based upon a current orientation of the tiller arm 416 (or other steering mechanism). The operator would use the navigation lines to steer straight down the ramp or to estimate whether or not they will make a turn, similar to the backup cameras on modern vehicles.
  • the processor 454 controls the speed of the pallet lift 410 by controlling the motor 466 (and the brake 468 , if provided, FIG. 29 ).
  • the motor 466 is shown as a standard electric pallet jack drive motor 466 connected to the rear wheel 418 . Hub motors within the load wheels 420 could be used as an alternative.
  • a speed limiter could be automatically implemented by the processor 454 once the pallet lift 410 detects that it is descending a ramp, such as by detecting a tilt in excess of a threshold by the tilt sensor 458 .
  • the pallet lift 410 could also have a button or switch in the user interface 464 (shown in FIG. 30 as a UI on display 470 , which may be a touch screen) which turns on “ramp mode” that activates the speed control and adjusts the previously mentioned Active Stability Control and Active Traction Control settings for optimal ramp settings. Pressing the “ramp mode” button may also enable the processor 454 to activate the tilt actuator 446 based upon input from the tile sensor 458 , such that when the tilt actuator 446 detects that it being tilted relative to gravity (e.g.
  • the processor 454 receives this signal from the tilt actuator 446 and sends counteractive signals to the tilt actuator 446 to maintain the platform 414 perpendicular to gravity (or tilted slightly back).
  • the processor 454 sends signals to the tilt actuator 446 to move the platform 414 back toward the tines 444 to maintain the upper surface of the platform 414 perpendicular to gravity (or tilted slightly back).
  • one embodiment could use the tilt sensor 458 to detect the side to side angle (roll) of the pallet lift 410 as well as the pitch, and if the angle of the lift is past a pre-determined safe angle, the electronic controller could take action to prevent tipping, such as slowing or stopping the pallet lift 410 by reducing power to the motors 466 or applying the brake 468 , lowering the load height by releasing the lift actuator 430 , increasing or decreasing the tilt angle by appropriately controlling the tilt actuator 446 or a combination thereof.
  • the pallet lift 410 may be driven on various surfaces in a range of conditions (hot, cold, rain, snow, aluminum ramps, steel ramps, pavement, concrete, dirt, wood etc.) and in order to improve traction, the processor 454 could detect drive wheel (in this case, the rear wheel 418 ) slip and take action to reduce the wheel slip and help regain control. This would be specifically helpful while on a ramp, since losing traction while descending the ramp would cause loss of steering and loss of speed control.
  • drive wheel in this case, the rear wheel 418
  • One method to detect drive wheel slip is by comparing the pallet lift 410 acceleration, as detected by an accelerometer (such as tilt sensor 458 ), to the drive wheel speed, as provided by the speed sensor 460 (which may be a drive wheel encoder) and comparing these inputs to a function which characterizes normal acceleration vs wheel speed.
  • an accelerometer such as tilt sensor 458
  • the speed sensor 460 which may be a drive wheel encoder
  • the pallet lift 410 could sense the weight of the load and automatically adjust the previously mentioned Active Stability Control, Active Traction Control and Active Speed Control settings to suit the load.
  • the load sensing could be done by measuring the line pressure of the hydraulic lifting mechanism of the tilt actuator 446 or by load cells placed under the load platform or by deriving it from the energy required to accelerate the load.
  • the pallet lift 410 Since the ramps that the pallet lift 410 is used on are very narrow, it can be difficult to navigate without hitting the side guard rails of the ramp. To prevent damage to the pallet lift 410 or ramp, the pallet lift 410 could have side bumpers that contact the guard rails of the ramp before the rest of the pallet lift 410 does. By positioning the bumpers near the front and/or back of the pallet lift 410 , steering the pallet lift 410 straight down the ramp would no longer be required.
  • the bumpers could “sliders,” hard plastic or rubber material which slides along the side guard rail of the ramp.
  • the bumpers could be rolling wheels positioned to roll along the guard rails of the ramp when in contact.
  • the rollers could be attached to the frame of the pallet lift 410 and used in a fixed fashion to keep the lift from driving too far to one side or the other.
  • the rollers could also be attached to the steering mechanism so that when in contact with the side guard rails, the steering is pushed to steer away from the side guard rail.
  • a different embodiment could use a combination of rollers and sliders that allows the pallet lift 410 to drive down the ramp while in contact with the side guard rail the whole time without any risk of catching or damaging the lift or ramp.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Handcart (AREA)
US17/985,848 2021-11-12 2022-11-12 Delivery systems for ramps or stairs Active US11873020B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US17/985,848 US11873020B2 (en) 2021-11-12 2022-11-12 Delivery systems for ramps or stairs
US18/529,807 US20240101176A1 (en) 2021-11-12 2023-12-05 Delivery systems for ramps or stairs

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US202163279057P 2021-11-12 2021-11-12
US202263327550P 2022-04-05 2022-04-05
US202263412770P 2022-10-03 2022-10-03
US202263416679P 2022-10-17 2022-10-17
US17/985,848 US11873020B2 (en) 2021-11-12 2022-11-12 Delivery systems for ramps or stairs

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/529,807 Continuation US20240101176A1 (en) 2021-11-12 2023-12-05 Delivery systems for ramps or stairs

Publications (2)

Publication Number Publication Date
US20230150560A1 US20230150560A1 (en) 2023-05-18
US11873020B2 true US11873020B2 (en) 2024-01-16

Family

ID=84332364

Family Applications (2)

Application Number Title Priority Date Filing Date
US17/985,848 Active US11873020B2 (en) 2021-11-12 2022-11-12 Delivery systems for ramps or stairs
US18/529,807 Pending US20240101176A1 (en) 2021-11-12 2023-12-05 Delivery systems for ramps or stairs

Family Applications After (1)

Application Number Title Priority Date Filing Date
US18/529,807 Pending US20240101176A1 (en) 2021-11-12 2023-12-05 Delivery systems for ramps or stairs

Country Status (5)

Country Link
US (2) US11873020B2 (es)
EP (1) EP4180303A3 (es)
CN (1) CN116119576A (es)
CA (1) CA3181476A1 (es)
MX (1) MX2022014298A (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230017430A1 (en) * 2021-07-15 2023-01-19 Makita Corporation Cart

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12084103B2 (en) * 2022-12-26 2024-09-10 Brett Baron Automated shopping cart that self stores in vehicle

Citations (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681202A (en) 1950-07-08 1954-06-15 Paul D Germond Pallet truck
US3243194A (en) 1964-04-01 1966-03-29 Clark Equipment Co Entry wheel arrangement for pallet truck
US3257018A (en) 1965-08-16 1966-06-21 Ray P Miles Hand truck
US3913765A (en) * 1967-08-15 1975-10-21 Knickerbocker Company Lift truck load lifting mechanism
US4027771A (en) 1975-05-08 1977-06-07 Adams Thomas F Pallet truck for use with fork lift truck
JPS53538A (en) 1976-06-24 1978-01-06 Shikoku Seisakusho Kk Carrying truck
US4279328A (en) * 1978-04-28 1981-07-21 Ab Volvo Device for orienting a lifting means, for example, in relation to a load
JPS6177563A (ja) 1984-09-25 1986-04-21 財団法人鉄道総合技術研究所 階段又はエスカレ−タ昇降用の車椅子補助台車
US5417541A (en) 1994-03-16 1995-05-23 Gregg Herron Manual forklift pallet jack for unloading the contents of a beverage delivery truck
US5752584A (en) * 1995-04-03 1998-05-19 Crown Equipment Corporation Auxiliary lifting forks for double-length pallet trucks
EP0889000A1 (fr) 1997-07-04 1999-01-07 Armtop Elévateur à fourche
JP2001055178A (ja) 1999-08-17 2001-02-27 Yoshizawa Kiko Kk 荷物運搬車
US6385518B1 (en) * 1999-04-29 2002-05-07 Jungheinrich Aktiengesellschaft Industrial truck with a tilt prevention mechanism
US6551050B1 (en) 1999-06-25 2003-04-22 Kaltec Of Minnesota Rolling stabilizer lift attachment
EP1357080A2 (de) 2002-04-24 2003-10-29 Werner Georg Schröder Stapler mit Zentralmast
US20050042068A1 (en) 2003-08-18 2005-02-24 Ronald Ehmen Forklift with stabilizing forks
US6968241B2 (en) * 2000-01-11 2005-11-22 Brueninghaus Hydromatik Gmbh Device and method for controlling the position for working devices of mobile machines
EP1829815A2 (en) 2006-03-03 2007-09-05 O'Keeffe, Eric A forklift truck
US7274970B2 (en) * 2004-06-04 2007-09-25 Jungheinrich Aktiengesellschaft Device for aiding stacking and unstacking for a stacker truck
WO2010111298A1 (en) 2009-03-23 2010-09-30 Lancaster P R Iii Methods and apparatuses for loading and unloading by pallet truck
US7873542B2 (en) 1998-05-20 2011-01-18 Coca-Cola Refreshments USA, Inc. Method of distributing product utilizing preloaded mini-pallets
US20110234389A1 (en) * 2008-11-11 2011-09-29 Deutsche Post Ag Guidance and collision warning device for forklift trucks
DE202011005128U1 (de) 2011-04-11 2012-05-21 Franz Kirschner Kippvorrichtung für Hubwagen
KR20120121577A (ko) 2011-04-27 2012-11-06 현대중공업 주식회사 전동 지게차의 마스트 자동 레벨링장치
US20130127126A1 (en) 2011-05-13 2013-05-23 Dan Lantz Pallet truck with lift indicator assembly and associated methods
US8475109B2 (en) 2009-08-25 2013-07-02 Escalera, Inc. Modular dolly
US8793054B2 (en) * 2005-06-22 2014-07-29 Volvo Construction Equipment Ab System and a method of controlling the tilting of a loadcarrying implement of a movable work machine, and a movable work machine
US8833736B2 (en) * 2011-12-15 2014-09-16 Big Lift, Llc Powered pallet truck
US8894076B2 (en) * 2008-10-20 2014-11-25 Magline, Inc. Cart with movable platform
US8979099B1 (en) 2012-01-31 2015-03-17 Bruce G. Ellis Foldable and width adjustable pallet jack
US20170015537A1 (en) * 2015-07-13 2017-01-19 George R. Bosworth, III Lifting fork positioning system
WO2017027924A1 (en) 2015-08-18 2017-02-23 Newell Gregory Dual motor drive system for a material handling device
US9714047B1 (en) 2016-04-12 2017-07-25 Big Lift, Llc Pallet truck having a selective turning radius
US20170240194A1 (en) * 2016-02-22 2017-08-24 Rehrig Pacific Company Modular pallet jack
US9822507B2 (en) * 2014-12-02 2017-11-21 Cnh Industrial America Llc Work vehicle with enhanced implement position control and bi-directional self-leveling functionality
EP3251918A1 (en) 2016-06-02 2017-12-06 Toyota Material Handling Manufacturing Sweden AB A lift-truck with automated climbing function
WO2018067127A1 (en) 2016-10-04 2018-04-12 Ford Global Technologies, Llc Dolly with automated height adjustment
US10737922B2 (en) 2018-08-08 2020-08-11 International Business Machines Corporation Mechanically actuated load stabilizer for pallet jacks
US20200269895A1 (en) * 2019-02-25 2020-08-27 Rehrig Pacific Company Powered sled
EP3725641A1 (en) 2017-12-11 2020-10-21 Newkoadwind.,Co.Ltd Inclination-adjustable cart apparatus
WO2020222121A1 (en) 2019-04-30 2020-11-05 Zonzini, Jacopo Pallet truck
US10988155B2 (en) * 2019-02-25 2021-04-27 Rehrig Pacific Company Adjustable span tine pallet jack
US11034371B2 (en) 2019-08-19 2021-06-15 Rehrig Pacific Company Pallet sled
CN113602337A (zh) 2021-08-06 2021-11-05 深圳供电局有限公司 断路器转运小车
US20220122029A1 (en) 2020-09-22 2022-04-21 Rehrig Pacific Company Pick assist system

Patent Citations (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681202A (en) 1950-07-08 1954-06-15 Paul D Germond Pallet truck
US3243194A (en) 1964-04-01 1966-03-29 Clark Equipment Co Entry wheel arrangement for pallet truck
US3257018A (en) 1965-08-16 1966-06-21 Ray P Miles Hand truck
US3913765A (en) * 1967-08-15 1975-10-21 Knickerbocker Company Lift truck load lifting mechanism
US4027771A (en) 1975-05-08 1977-06-07 Adams Thomas F Pallet truck for use with fork lift truck
JPS53538A (en) 1976-06-24 1978-01-06 Shikoku Seisakusho Kk Carrying truck
US4279328A (en) * 1978-04-28 1981-07-21 Ab Volvo Device for orienting a lifting means, for example, in relation to a load
JPS6177563A (ja) 1984-09-25 1986-04-21 財団法人鉄道総合技術研究所 階段又はエスカレ−タ昇降用の車椅子補助台車
US5417541A (en) 1994-03-16 1995-05-23 Gregg Herron Manual forklift pallet jack for unloading the contents of a beverage delivery truck
US5752584A (en) * 1995-04-03 1998-05-19 Crown Equipment Corporation Auxiliary lifting forks for double-length pallet trucks
EP0889000A1 (fr) 1997-07-04 1999-01-07 Armtop Elévateur à fourche
US7873542B2 (en) 1998-05-20 2011-01-18 Coca-Cola Refreshments USA, Inc. Method of distributing product utilizing preloaded mini-pallets
US6385518B1 (en) * 1999-04-29 2002-05-07 Jungheinrich Aktiengesellschaft Industrial truck with a tilt prevention mechanism
US6551050B1 (en) 1999-06-25 2003-04-22 Kaltec Of Minnesota Rolling stabilizer lift attachment
JP2001055178A (ja) 1999-08-17 2001-02-27 Yoshizawa Kiko Kk 荷物運搬車
US6968241B2 (en) * 2000-01-11 2005-11-22 Brueninghaus Hydromatik Gmbh Device and method for controlling the position for working devices of mobile machines
EP1357080A2 (de) 2002-04-24 2003-10-29 Werner Georg Schröder Stapler mit Zentralmast
US20050042068A1 (en) 2003-08-18 2005-02-24 Ronald Ehmen Forklift with stabilizing forks
US7274970B2 (en) * 2004-06-04 2007-09-25 Jungheinrich Aktiengesellschaft Device for aiding stacking and unstacking for a stacker truck
US8793054B2 (en) * 2005-06-22 2014-07-29 Volvo Construction Equipment Ab System and a method of controlling the tilting of a loadcarrying implement of a movable work machine, and a movable work machine
EP1829815A2 (en) 2006-03-03 2007-09-05 O'Keeffe, Eric A forklift truck
US8894076B2 (en) * 2008-10-20 2014-11-25 Magline, Inc. Cart with movable platform
US20110234389A1 (en) * 2008-11-11 2011-09-29 Deutsche Post Ag Guidance and collision warning device for forklift trucks
WO2010111298A1 (en) 2009-03-23 2010-09-30 Lancaster P R Iii Methods and apparatuses for loading and unloading by pallet truck
US8475109B2 (en) 2009-08-25 2013-07-02 Escalera, Inc. Modular dolly
DE202011005128U1 (de) 2011-04-11 2012-05-21 Franz Kirschner Kippvorrichtung für Hubwagen
KR20120121577A (ko) 2011-04-27 2012-11-06 현대중공업 주식회사 전동 지게차의 마스트 자동 레벨링장치
US20130127126A1 (en) 2011-05-13 2013-05-23 Dan Lantz Pallet truck with lift indicator assembly and associated methods
US8833736B2 (en) * 2011-12-15 2014-09-16 Big Lift, Llc Powered pallet truck
US8979099B1 (en) 2012-01-31 2015-03-17 Bruce G. Ellis Foldable and width adjustable pallet jack
US9822507B2 (en) * 2014-12-02 2017-11-21 Cnh Industrial America Llc Work vehicle with enhanced implement position control and bi-directional self-leveling functionality
US20170015537A1 (en) * 2015-07-13 2017-01-19 George R. Bosworth, III Lifting fork positioning system
US9908549B2 (en) * 2015-08-18 2018-03-06 Powerhandling Inc. Dual motor drive system for a material handling device
WO2017027924A1 (en) 2015-08-18 2017-02-23 Newell Gregory Dual motor drive system for a material handling device
US20170240194A1 (en) * 2016-02-22 2017-08-24 Rehrig Pacific Company Modular pallet jack
US9714047B1 (en) 2016-04-12 2017-07-25 Big Lift, Llc Pallet truck having a selective turning radius
EP3251918A1 (en) 2016-06-02 2017-12-06 Toyota Material Handling Manufacturing Sweden AB A lift-truck with automated climbing function
WO2018067127A1 (en) 2016-10-04 2018-04-12 Ford Global Technologies, Llc Dolly with automated height adjustment
EP3725641A1 (en) 2017-12-11 2020-10-21 Newkoadwind.,Co.Ltd Inclination-adjustable cart apparatus
US10737922B2 (en) 2018-08-08 2020-08-11 International Business Machines Corporation Mechanically actuated load stabilizer for pallet jacks
US20200269895A1 (en) * 2019-02-25 2020-08-27 Rehrig Pacific Company Powered sled
US10988154B2 (en) * 2019-02-25 2021-04-27 Rehrig Pacific Company Powered sled
US10988155B2 (en) * 2019-02-25 2021-04-27 Rehrig Pacific Company Adjustable span tine pallet jack
WO2020222121A1 (en) 2019-04-30 2020-11-05 Zonzini, Jacopo Pallet truck
US11034371B2 (en) 2019-08-19 2021-06-15 Rehrig Pacific Company Pallet sled
US20220122029A1 (en) 2020-09-22 2022-04-21 Rehrig Pacific Company Pick assist system
CN113602337A (zh) 2021-08-06 2021-11-05 深圳供电局有限公司 断路器转运小车

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
European Search Report for European Application No. 22207334.8 dated Jul. 12, 2023.
Partial Search Report for European Application No. 22207334.8 dated Mar. 14, 2023.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230017430A1 (en) * 2021-07-15 2023-01-19 Makita Corporation Cart

Also Published As

Publication number Publication date
CN116119576A (zh) 2023-05-16
CA3181476A1 (en) 2023-05-12
US20240101176A1 (en) 2024-03-28
MX2022014298A (es) 2023-05-15
US20230150560A1 (en) 2023-05-18
EP4180303A3 (en) 2023-08-16
EP4180303A2 (en) 2023-05-17

Similar Documents

Publication Publication Date Title
US11873020B2 (en) Delivery systems for ramps or stairs
US6921095B2 (en) Hand trolley with winch operated lifting carriage
US20110206489A1 (en) Load transport system and method
US20170057392A1 (en) A Repositionable Load Carrying Tray Assembly for a Vehicle
US20050042068A1 (en) Forklift with stabilizing forks
JP6491913B2 (ja) 電動２輪荷車
ES2264760T3 (es) Maquina para manipulacion de la carga de tipo diablo.
US9403648B2 (en) Electric device for lifting moving sidewalk for vehicle
JPS5920777A (ja) 運搬車
WO2009104209A1 (en) Self-propelled vehicle for transporting materials
JP6843354B2 (ja) 階段昇降装置
US20230084587A1 (en) Cargo Transport System and Method
JP2002178930A (ja) 階段走行可能な運搬車
US20240300563A1 (en) Pallet lift
JP7419708B2 (ja) 階段昇降装置及び搬送方法
JP4587379B2 (ja) 運搬車
GB2491112A (en) Self-loading ramp for a wheeled vehicle
JP2022060619A (ja) 荷物積み込み装置
US20030002968A1 (en) Lift and load dolly
US10159613B2 (en) Vehicle, device and method for loading a vehicle
US11648866B2 (en) Transport vehicle and transport system
JP7561072B2 (ja) 台車昇降装置及び車両
EP4444596A1 (en) Decorative article delivery device
JP2022060621A (ja) 荷物積み込み装置
JP2007314078A (ja) キャリー

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

AS Assignment

Owner name: REHRIG PACIFIC COMPANY, CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KALINOWSKI, DANE GIN MUN;POPOVITS, JOSEPH E., II;ENGLERT, TRAVIS JAMES;SIGNING DATES FROM 20230112 TO 20230125;REEL/FRAME:062500/0715

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS

STPP Information on status: patent application and granting procedure in general

Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT RECEIVED

STPP Information on status: patent application and granting procedure in general

Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED

STCF Information on status: patent grant

Free format text: PATENTED CASE